The development of impurity doped luminescent materials, or phosphors, have been continuously pursued for a variety of applications nowadays. However, the majority of phosphors undergo time-consuming and energy inefficient preparation, such as conventional high-temperature solid-state reaction (SSR). In the present work, a facile microwave-assisted solid-state (MASS) method is used to prepare a series of transition metal (Mn⁴⁺ or Cr³⁺) doped lithium aluminates and gallates. With a one-step 25-min MASS method, LiAlO₂ is obtained in γ phase rather than α phase. Using the same method, followed by a short thermal treatment in air or two-step MASS preparation, inverse spinel LiAl₅O₈:Mn⁴⁺ phosphors with deep-red emission are obtained, while near-infrared emitting LiGa₅O₈:Cr³⁺ persistent phosphors are successfully prepared with a 40-min MASS process. Compared to the SSR method, LiGa₅O₈:Cr³⁺ achieved by MASS exhibits totally different trap depth and trap distributions, which is evidenced by the temperature dependency of persistent luminescence. The study of the detailed preparation of transition metal doped lithium aluminates and gallates may enable more widespread use of MASS method and facilitate the exploration of new luminescence properties involving defects.

如今，对于各种应用，一直在不断地追求掺杂杂质的发光材料或磷光体的开发。但是，大多数磷光体都经过耗时且能源效率低下的准备工作，例如常规的高温固态反应（SSR）。在目前的工作中，一种简便的微波辅助固态（MASS）方法用于制备一系列过渡金属（Mn ⁴⁺或Cr ³⁺）掺杂的铝酸锂和镓酸锂。通过一步式25分钟的MASS方法，可以在γ相而不是α相中获得LiAlO ₂。使用相同的方法，然后在空气中进行短时间热处理或分两步进行MASS制备，制成尖晶石型LiAl ₅ O ₈：Mn ⁴⁺获得了具有深红色发射光的磷光体，同时通过40分钟的MASS工艺成功制备了近红外发射的LiGa ₅ O ₈：Cr ³⁺持久性磷光体。与SSR方法相比，MASS获得的LiGa ₅ O ₈：Cr ³⁺具有完全不同的陷阱深度和陷阱分布，这由持续发光的温度依赖性证明。对过渡金属掺杂的铝酸锂和镓酸锂的详细制备方法的研究可以使MASS方法得到更广泛的应用，并有助于探索涉及缺陷的新的发光性质。